Bituminous putty.



UNITED STATES PATENT OFFICE.

WILLIAM A. LEVEBING, OF CHICAGO, ILLINOIS, ASSIGNOR T0 STANDARD ASPHALT & RUBBER 00., OF CHICAGO, ILLINOIS, A CORPORATION OF NEW JERSEY. I

BITUMINOUS PUTTY.

No Drawing.

To all whom it mag concern:

Be it known that I WILLIAM A. LEVERING, a citizen ofthe United States, residing in the city of Chicago, county of Cook, in the State of Illinois, have invented certain new and useful Improvements in Bituminous Putty, of which the following is a specification.

My invention relates to a new and improved and useful product, a. e., bituminous putty'and has for its salient objects to produce a compound which has all the necessary and desirable characteristics of a first class putty and is nevertheless, composed of many substances hereinafter enumeratedwhich are not found in the ordinary commercial putty; to produce a product which consists essentially of a given proportion of bituminous or as haltic cement and a given proportion of ime dust united into a homogeneous mass; to produce a product of the above character which will not dry or crack with age, which will not burn or disintegrate under any ordinary heat, but which nevertheless, can be melted or softened when subjected to a sufiiciently high'temperature; to produce a product the binder of which is especially characterized by its adhesive, cementitious and cohesive qualities; to produce a product which is peculiarly able to withstand extremes of temperature, i. 6., will not crack in winter or soften or m elt under the heatof the summer sun; to produce a product which always remains elastic regardless of changes in temperature and does not shrink with agej to produce a product which is an electric insulator; to

produce a product which is adapted to a wide variety of uses not common to ordinary commercial putty such as in the expansion joints of battery cells in repairing or setting slate, tile, stone or concrete, in repairing felt, tin, gravel or other lprepared roofings; to produce a product w ich can be economically and readily manufactured and in general to produce an improved product of the character referred to.

Commercial putties are ordinarily made from a mixture of boiled linseed oil and whiting or white lead. The characteristics and theuses of commercial putty are too well known to need elucidation. Commercial putty, however, has many limitations which are overcome in my improved product Specification of Letters Yatent. Application fi1ed September 3, 1912. Serial No. 718,259.

PatentedDec. 30, 1913.

as appears in the stated objects of the invention.

I have discovered that a putty having the characteristics enumerated may be formed by combining lime dust in proper proportion with 'air blown asphalt. Th1s air blown asphalt is formed from petroleum residuum, which is subjected to the action of heat and air for a considerable eriod of time until the liquid or said liqui' residuum is solidi: fied. This air blown petroleum residuum may be obtained in the manner described in Patents #635429- and 635430 issued to G. F. and G. C. K. Culmer. The product made in accordance with these patents is a solid'or semi-solid asphaltic com ound devoid of pitch and consisting of ehydrated and oxidized petroleum reslduumi which is chemicallydifferent from the original residuum, being higher in its aspha tene content and lower in its petrolene content than the residuum. It is known in fact as an air blown asphaltic residuum. It possesses properties materially difierent from those of natural asphalts or untreated petroleum residuum or compound of natural asphalts and petroleum residuums. The use of natural asphalts or untreated residuum is not. satisfactory. The former is too brittle .andwill not stand the dismtegratmg action of the weather. If sufiicient, liqui residuum is used to soften the natural a phalt to the proper degree then the compound will be lacking in consistency necessary in a proper coating for the purposes here in question. This bituminous product forms a binder and the lime dust the foundation or carrier for the binder, Theyma be mixed in the proportion of 65% of ime dust to 35% of the bituminous compound the two being combined under heat by mixing instead of grinding and the percent:

ages of the ingredients may be varied in order to obtain a putty of the desired consistency. I

In its broader aspects the invention is not limited to the use of the particular bituminous' product specified in the patents enumerated or to the use of lime dust. For example, fine sand, coal dust, or'other comminuted mineral matter may be substituted for the lime dust and a suitable fluxed or softened asphalt or bitumen may be substituted for the air blown asphalt referred to. Care, however, must be taken to use such asphalt or bitumen as will obtain the desired results. For example, most natural asphalt would be too hard and brittle, not sufficiently elastic or rubbery to'serve the purpose.

I claim as my invention:

1. The herein described product consisting of a major portion of mineral dust mixed with a minor portion of an air blown asphalt formed from dehydrated and oxidized petroleum residuum of a solid or semi-solid consistency markedly higher in its content ofasphaltene and lower in its petrolene content than the residuum from which said asphaltic product was formed, said mixture forming a bituminous body. I

2. The herein described product consisting of a major portion of lime dust and .a minor portion of air blown petroleum residuum, said constituents when united forming a bituminous putty.

3. The herein described product consisting of a mixture of mineral dust and an asphaltic compound formed from dehydrated and oxidized petroleum residuum of a solid consistency, said asphaltic compound being markedly higher in its asphaltene content andlower in its-petrolene content than the residuum from which said asphaltic compound is formed, said mixture forming a pervious to the disintegrating action of the weather.

WILLIAM A. LEVERING. Witnesses:

F. G. BELKNAP, ED. C. ENNIS. 

